The best thing is to look at other hosts nearby. Are there many hosts, what do they charge, are they fully booked or empty? Also consider why guests would stay in your area: general tourism, business trips, walking tours, a specific attraction nearby? I'm near a major airport so most of my guests just stay one night to catch a flight, with late check-ins and early departues, and I'm forever explaining about local buses - the airport is my USP so that's what I do. Happy hosting!